I don't get those requests. I use charts, regression model and synapse in each report. I learned early, easier to show it there, then sitting in my work file. With synapse you have to load new data with each appraisal to be accurate. But the excell template is easy to set up, they have how to info. And the MLS provides excell data, well mine does. Once everything is set up with your templates then it's easy for them to do your adjustments while showing how. Now with items like baths, etc I say i use cost $ amount new minus depreciation. patios, decks, porche just a number, but the same thought, minor adjustments.
For GLA, there has been many times posted here an excell chart that shows how you got it. Mostly pretty good, and you can change the GLA final $ amount. But is shows that at least you gave it some value thought. Sometimes GLA doesn't make sense. This is the excell file attached, you just add in numbers. Take the time to learn excell.
